Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149385
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =48a(5) =188a(6) =790a(7) =3373a(8) =14775a(9) =65711a(10) =296183a(11) =1349263a(12) =6200429a(13) =28702895a(14) =133696901a(15) =626086696a(16) =2945367102a(17) =13911989913a(18) =65943630939a(19) =313555617506
External references
- oeis: A149385